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7 February, 00:09

If sin (Ф) = 3/5, and cos (Ф) = -4/5, which of the following is true?

a.) sin ((π/2) - Ф) = 4/5

b.) cos ((π/2) - Ф) = -3/5

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Answers (1)
  1. 7 February, 00:21
    0
    Step-by-step explanation:

    b.) cos ((π/2) - Ф) = -3/5 is true because:

    cos ((π/2) - Ф) = sin (Ф)
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